def describe_pet(pet_name, animal_type='dog'):
    print(f"\nI have a {animal_type}.")
    print(f"My {animal_type}'s name is {pet_name.title()}.")


# describe_pet('hamster', 'harry')
# describe_pet('dog', 'willie')
describe_pet(pet_name='willie', animal_type='dog')
describe_pet('pp')
